hadoop Can not start

my hadoop Can not start. help!
/usr/lib/hadoop/bin/start-all.sh
starting namenode, logging to /var/log/hadoop/root/hadoop-root-namenode-master.out
Failed to connect to db jdbc:postgresql://master/ambarirca as user mapred password mapred and driver org.postgresql.Driver with java.io.IOException: Can’t connect to database jdbc:postgresql://master/ambarirca
at org.apache.ambari.log4j.common.store.DatabaseStore.(DatabaseStore.java:55)
at org.apache.ambari.log4j.hadoop.mapreduce.jobhistory.JobHistoryAppender.activateOptions(JobHistoryAppender.java:116)
at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:257)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:133)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:97)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:689)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:647)
at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:568)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:442)
master: starting datanode, logging to /var/log/hadoop/hdfs/hadoop-hdfs-datanode-master.out

Hi Z,
It looks like you need to start Ambari-server prior to running the start-all.sh script. And if this is an ambari installed cluster is there a reason you are not using ambari to start up hadoop?
Thanks,
Ted.
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